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, e; E. M0LYNEUX. TRANSMISSION FOR POWER TABLE SEWING MACHINES, Kac- APPLICATION FILED MAR. I. ma.

Patented Dec. 9, 1919.

UNITED STATES PATENT ormon.

GEORGE E. oLYNEUk, or BAYONNE, NEW JERSEY.

TRANSMISSIOTI FOR POWER-TABLE SEWING-MACHINES, 8w.

Application filed March 1,1918. Serial No. 219,785.

To all whom it may concern :1 p p Be it known that I, GEORGE E. MOLYNEUX, a citizen of the United States, residing in Bayonne, in the State of New Jersey, have invented certain new and useful Improvementsfin, Transmissions for Power- Table Sewing-Machines, &c., of which the following is a specification, reference being had to the accompanying drawing, forming apart hereof.

his invention relates particularly to power transmission devices such as those which are employed to drive the several sewing machines of a power-table from a common driving shaft and permit each sewing machine, at the will of itsoperator, to be operatively connected with or d sconnected from the driving shaft, a brakeusually be ing applied to the transmissiondevice simultaneouslywith the disconnection from the driving shaft. The particular. object in view in the development of theinvention hasbeen to construct the clutchmechanism employed in such manner as to eliminate end thrust on the driving shaft while retaining the advantages of a. friction clutch and making the transmissionsimple, compact, self-con tained and self-lubricating. The invention will bedescribed more fully hereinafter with reference to the accompanying drawing in which it is illustrated, and inwhich.

Figure 1 is a view of the improved transmission in longitudinal section, a portion of a power-table beingalso shown.

Fig.2 is a detail view insection on the plane indicated by the line 2-2 of Fig. 1,

' looking inthe direction ofthe arrows.

' p A power-table, on which may be mounted the several sewing machines to be drlven through the improved transmission devices .from the common driving shaft, is indicated at a. supported'in suitable bearingsbelow the table a is the driving shaft 6, whlch may be J either sectional or continuous. To a bracket 0;, on the underside of the powertable, is suitably secured a casing c which supports and inclosesthe transmission mechanism hereinbefore referred to. The open end of the casing is closed by a removable cap 0 which may be secured by screws 0 The shaft 6 may have a bearing directly in the cape, but at the other end of the casmg ithas a bearing in asleeved which receives,

outside of the casing, a pulley d, bywhich the sewing machine is driven. i

Specification of Letters Patent.

' a disk d 72, which Patented The sleeve cl receives or has formed there wlth a cylindrical brake drum (Z and a conical clutch member d the clutch member flaring outwardly as shown. A collard may be secured to the sleeve (5 to prevent or to limit movement thereof to the left A femalelclutoh member 6, internally tapered to cooperate with the male clutch member 6Z 1s secured by screws 6, so as to permit the assembling of the parts, to a clutch carrier 6 whichis mounted on the shaft 6 and is held to rotate therewith, while free to move longitudinally thereon, by a spline 6 The clutch carrier 6 so that the clutch member 6 shall clear the clutch member (P, by a spring. 6 which abuts against a collar 6 secured to the shaft. i Q

The controlling pedal by which the operator controls the transmission, is connected, as usual, by a link 7, to an arm 9 of a rock shaft 9, the pedal acting against a spring 9 which is connected to another arm 9? of the rock shaft. A brake arm gf 'is also carried by the rock shaft g'and is arranged to cooperate with the brake drum (Z A clutch arm 9 also carriedby the shaft g, engages a circumferentially grooved collar h, which is mounted to slide on the sleeve d and is connected by rods hlwith a thrust ring 72, which bears against the inner face of the clutch carrier 6 Thrust levers k are pivotally connected at oneQend withthe thrust ring h through ears it onthe latter and hear at the other end against the face of which supports the brake drum (Z clutch; member d These thrust are pivotally mounted on a spider is mountedloosely on the shaft 5 and may be held from longitudinal movement thereon by spring rings [L7 which are snapped into circumferential grooves b" on the shaft 6 l a Normally the parts are in the positions and the levers 7L3 shown in Fig: 1, with the-clutch carrier 6 pressed to p the left by the spring ,6? so that theclutch member 6 clears the clutch member d and with the brake arm 9 resting upon the brake drum el whereby the sleeve (Z is freed from theshaft b and is -held sta- .by through the arm 95, circumferentially Dec. 9, 1919.

grooved h, irods h andthrust ring 7L2, the clutch carrier 6 is moved to the right, against the pressure of the spring and the clutch member 6 is brought into driving engagement with the clutch member d At the same time thebrake g is moved away from the brake drum (F. The sleeve d is then driven with the shaft 6 and, through the pulley d, the sewing machine is driven. As soon as the pressure of the operators' foot on the pedal is relieved the pressure of the spring g causes the shaft 9 to be rocked in a direction to apply the brake g to the drum d and to permit the clutch member 6 to be moved by the springe in a direction toclear the clutch member 6!, whereby the sleeve d ceases to rotate and the sewing machine, driven'by the pulley cl ceases to opcrate. It will be observed that the slight pressure necessary to open the clutch is exerted directly by the spring 0 against the sliding clutch carrier e the brake being applied to the brake drum at the same tlme by the pressure of the spring 9 When, how

ever, the sleeve (Z is to be coupled with the shaft 6, so as to be driven thereby, the pressure of the operators foot, through the pedal, the link 7", the arm 9, the shaft 9 and the arm 9 is exerted directly, through the longitudinally movable grooved ring it, the rods h and the thrust ring h against the inner face of the clutch carrier 6 the pressure against the ring it being caused to react, through the pressure levers h against the proximate face of the disk (Z which carriesthe brake drum and the male clutch member. There is, therefore, when the clutch is being engaged and While it is held engaged, no end thrust on the shaft 6 which tends to move the same longitudinally.

It will be-understood that various changes in details of construction and arrangement may be made to suit different conditions of usewithout departingfrom the spirit of the inventionso far as the same is set forth in the accompanying claims.-

I claim as my invention:

1.-In a transmission for a power-table and the like, the combination of a driving shaft, two coeperating clutch members, both of which are supported directly on the driving shaft, one ofsaid clutch members being rotatable with the driving shaft, one of said clutch members being movable longitudinally on the driving shaft and one of said clutch members being rotatable independently of the driving shaft and held from longitudinal movement thereon, means to move the longitudinally movable member onj thedrivlng shaft in one direction,

controllable means to move the movable clutch member in the opposite direction, and means whereby the thrust of such controllable means against themovable member in one direction is transmitted to the longitudinally immovable member in the opposite direction and the driving shaft is relieved of end thrust pressure.

2. In a transmission for a power-table and the like, the combination of a driving shaft, two cooperating conical clutch membersboth of which are supported directly on the driving shaft, one of said clutch memberslbeing rotatable with the driving shaft, one of said clutch members; being movable longitudinally on the driving shaft, and one of said clutch members being rotatableindependently of the driving shaft and held from longitudinal movement thereon, means to move the longitudinally movable member on the driving shaft in the direction to disengage the clutch members, controllable means to move the movable member in the opposite direction and means whereby the thrust of such controllable means against the movable member is transmitted to I the longitudinally immovable member in the opposite direction and the driving shaft is relieved of end thrust pres sure. i r 1 3. In a transmission for a power-table and the like, the combination of a driving shaft, an outwardly flaring conical male clutch member, an inwardly conical female clutch member to cooperate therewith, one of said clutch members being rotatable with the driving shaft, one of said clutch members being movable longitudinally on the driving shaft, and one of said clutch members shaft," an outwardly flaring conical male clutch member, an inwardly conical female clutch member to'cotiperate therewith, said inwardly conical female, clutch member being rotatable with the driving shaft and movable longitudinally thereon, and said male clutch member being rotatable independently of the driving shaft, means to move the female clutch member longitudinally to disengage it from the male clutch member, controllable means to move the female clutch member in the opposite-direction and means whereby the thrust of such controllable means against the female member in one direction is transmitted to the male clutch member in the opposite direetionand the driving shaft is relieved of end thrust pressure.

5. In a transmission for a power-table movable longitudinally on the driving shaft and oneof said clutch members-being rotatable independently of the driving shaft, means to move the longitudinally movable clutch member on the driving shaft in one direction, means to move the movable clutch member in the opposite direction, a thrust lever connected atone end With said last named means and bearing at the other end against the other clutch member, and means mounted loosely on the shaft to support said thrust lever. t

6. In a. transmission for a power-table and the like, the combination of a driving shaft, cooperating clutch members mounted on the driving shaft, one of said clutch members being rotatablewith the driving shaft, one of said clutch members being movable longitudinally on the driving shaft and one of said clutch members being rotat-able independently of the driving shaft, means to move the longitudinally movable clutch member onthe driving shaft in one direction, means to move the movable clutch member in the opposite direction, a thrust lever connected at one end With said last named means and bearing at the other end against the other clutch member, and a sleeve mounted loosely on the driving shaft and held from longitudinal movement thereon, the thrust lever being pivotally mounted on said sleeve.

7. In a transmission for a power-table and the like, the combination of a driving shaft, a sleeve mounted loosely on the driving shaft and carrying a clutch member, a second clutch member to cooperate with the first and mounted to rotate With and slide on the shaft, means tomove said last named clutch member in one direction, a circumferentially grooved ring mounted loosely on the sleeve, a thrust rod connected at one end With said ring and acting at the other end against the movable clutch member, a thrust lever operatively connected at one end With the thrust rod and hearing at the other end against the other clutch member, and a sleeve mounted loosely on the shaft and supporting pivotally the thrust member.

This specification signed this 27th dayof February, A. D. 1918. V

GEORGE E. MOLYNEUX. 

